Ummm...Rapaire, I didn't wanna tell ya I thought you were crazy to be out in the 90's mowing the grass!**bg** Glad you are okay and thanks for the reminder to be careful.
My friends back East are always telling me, "but, kat, it's dry heat where you are." Yes, sez I, but it is also at 4500 feet above sea level and not much shade! Lot stronger sun.
My brother didn't know about humid heat when he first moved to MA. He walked to a local park, about 2-3 miles when it was infamously Hot, Hazy and Humid. When he got there, he collapsed in the shade. Finally was able to get some water and a bus home. He realised after, he'd come close to heat stroke and was never so foolish again.
It just pays to take it easy in high heat no matter the humidity. There's a reason some warm counties have siestas!